DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 26,319,524	$ 22,586,161
Derivative Asset	394,857	393,867
Derivative liabilities	(395,233)	(393,652)
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	25,419,524	21,586,161
Derivative Asset	394,857	393,159
Derivative liabilities	(394,457)	(393,652)
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	900,000	1,000,000
Derivative Asset	0	708
Derivative liabilities	(776)	0
Fair Value Hedges \| Matched interest rate swaps \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherAssets \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,674,510	2,425,106
Derivative Asset	2,052	23,271
Derivative liabilities	(90,527)	(46,159)
Fair Value Hedges \| Matched interest rate swaps \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,674,510	2,425,106
Derivative Asset	90,554	46,138
Derivative liabilities	(2,004)	(23,243)
Foreign Exchange \| Matched interest rate swaps \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherAssets \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	9,953,137	8,368,518
Derivative Asset	154,618	161,649
Derivative liabilities	(133,120)	(160,523)
Foreign Exchange \| Matched interest rate swaps \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	9,903,335	8,318,982
Derivative Asset	133,120	160,523
Derivative liabilities	(154,618)	(161,649)
Cash Flow Hedging \| Interest Rate Floor \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	900,000	1,000,000
Cash Flow Hedging \| Interest Rate Floor \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	900,000	1,000,000
Commodity \| Matched interest rate swaps \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherAssets \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	105,440	24,180
Derivative Asset	4,373	909
Derivative liabilities	(8,800)	(994)
Commodity \| Matched interest rate swaps \| Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	108,592	24,269
Derivative Asset	10,140	669
Derivative liabilities	$ (5,388)	$ (1,084)

Not Designated as Hedging Instrument

Designated as Hedging Instrument

Fair Value Hedges | Matched interest rate swaps | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherAssets | Not Designated as Hedging Instrument

Fair Value Hedges | Matched interest rate swaps | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities | Not Designated as Hedging Instrument

Foreign Exchange | Matched interest rate swaps | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherAssets | Not Designated as Hedging Instrument

Foreign Exchange | Matched interest rate swaps | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities | Not Designated as Hedging Instrument

Cash Flow Hedging | Interest Rate Floor | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities

Cash Flow Hedging | Interest Rate Floor | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities | Designated as Hedging Instrument

Commodity | Matched interest rate swaps | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherAssets | Not Designated as Hedging Instrument

Commodity | Matched interest rate swaps | Derivatives, Fair Value, by Balance Sheet Location: us-gaap:OtherLiabilities | Not Designated as Hedging Instrument